Question What is Gross Combination Weight? Answers The total weight of the powered unit, trailer, and cargo The total weight of a single vehicle without its load The maximum weight allowed by the manufacturer Explanation Gross Combination Weight (GCW) is the total weight of a powered unit, its trailer(s), and the cargo being carried. This questions appears in the following tests: Arkansas Passenger Connecticut Double Iowa Class B Knowledge Test Kentucky Class B Knowledge Test Louisiana Class B Knowledge Test South Carolina Class B Knowledge Test South Dakota Tank